sequential (25) load shift line

 https://kamchihau.blogspot.com/2022/12/tom-actually-how-many-people-in-hackers.html

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Ref:https://kamchihau.blogspot.com/2022/09/httpskamchihau_22.html 

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There're 5 conditions on which left or right shift doesn't work.
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1) The latch is being preset and clear.
2) The latch is feedbacking.
3) The latch is being level-trigger.
4) The flip flops is at the stage of toggling.
5) The commutator is idle (no up , no down)
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Me: Now, we mention condition_2. . 
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if load-shift line = 1, serial input = true;
if load-shift line = 0, parallel input = true;
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Me: If now I input 1 to the disabling point, all serial and paallel input is disabled.
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John: If disabling point = 1, what happen??
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if (disabling point = 1)
{

Q feed back to point A
-Q feed back to point B.

}